JP2018134998A - Air bag and air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air bag and an air bag device capable of restraining an occupant who moves obliquely forward.SOLUTION: An air bag 1 an air bag for a front passenger seat, expanded and spread between the front passenger seat and an instrument panel 11 includes a main bag 2, and a sub bag 3 connected to a side part 2e in a vehicle width direction inside of the main bag 2. A slit-like communication port 5 is provided in the side part 2e of the main bag 2, and with contact of an occupant with the main bag 2, the communication port 5 in a closed state is opened, gas flows in from the main bag 2 to the sub bag 3 via the opened communication port 5, and the sub bag 3 is expanded.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an airbag and an airbag apparatus for restraining an occupant of an automobile or the like at the time of a collision or the like. In the present invention, the front-rear, up-down, left-right directions correspond to the front-rear, up-down, left-right directions of the vehicle unless otherwise specified.

  2. Description of the Related Art An airbag device that restrains an occupant's body by inflating an airbag with an inflator at various parts around the occupant when a vehicle such as an automobile collides or the vehicle rolls over is known. For example, Patent Literature 1 discloses a pair of an airbag bag body, a vent hole communicating with the inside and outside of the airbag bag, tension applying means for applying tension in the longitudinal direction of the vent hole, and a gas ejection direction of the vent hole. An air bag device including a flow path regulating film having a surface portion is disclosed. During normal inflation and deployment, the airbag device is in a sealed state in which a predetermined tension is applied by the tension applying unit and the pair of surface portions of the flow path regulating film are closed, and leakage of gas from the vent hole is suppressed. . On the other hand, when the airbag bag body comes into contact with an obstacle or the like, the pair of surface portions of the flow path restricting film expand apart from each other, and the gas inside the airbag bag is exposed to the outside through the expanded vent hole. To be leaked.

  When the vehicle collides diagonally or collides with a small lap, the occupant moves inertially diagonally forward. Therefore, there is a need for an airbag device that restrains an occupant moving diagonally forward.

Japanese Patent No. 4659090

  The present invention has been made in view of the above-described conventional situation, and an object thereof is to provide an airbag and an airbag apparatus that can restrain an occupant moving obliquely forward.

  An airbag according to the present invention is an airbag for a passenger seat that inflates and deploys between a passenger seat and an instrument panel, and is connected to a main bag and a side portion of the main bag that is connected to an inner side in the vehicle width direction. A side wall of the main bag is provided with a slit-shaped communication port, and the communication port in the closed state is opened when the occupant comes into contact with the main bag. The gas flows from the main bag to the sub bag via the main bag, and the sub bag is inflated.

  In the airbag according to an aspect of the present invention, the communication port extends in the vehicle front-rear direction when the main bag is inflated, and the sub bag extends along the longitudinal direction of the communication port in the inflation completed state. Exists. In this case, the sub bag may have an overhanging portion that projects to the front side and / or the lower side in the inflated state.

  In the airbag according to one aspect of the present invention, a slit-like vent hole is provided on a lateral side of the main bag in the vehicle width direction, and the air bag is closed when the main bag is in contact with an occupant. A vent hole is opened, and gas is discharged from the main bag through the opened vent hole.

  In the airbag according to the aspect of the present invention, the rear portion of the sub bag is positioned rearward of the main bag in the inflated state.

  The airbag device of the present invention includes the airbag according to the present invention and an inflator that supplies gas to the main bag.

  According to the present invention, it is possible to quickly inflate and deploy the main bag, and to restrain the passenger seat occupant moving obliquely forward by a slanting projection or the like with the sub bag or the sub bag and the main bag.

(A) (b) is a front view of the airbag apparatus which concerns on embodiment. It is a side view of the airbag which concerns on embodiment. It is the III-III sectional view taken on the line of FIG.1 (b). It is the IV-IV sectional view taken on the line of FIG. It is a top view of the panel which comprises the upper part and rear part of a main bag. It is a top view of the panel which comprises the lower part and front part of a main bag. It is a top view of the panel which comprises a subbag. It is a top view of the panel which comprises the airbag which concerns on another embodiment. It is a top view of the panel which comprises the airbag which concerns on another embodiment. (A) (b) is a side view of the airbag which concerns on another embodiment. (A) (b) (c) is a side view of the airbag which concerns on another embodiment.

  Hereinafter, the airbag apparatus according to the embodiment will be described with reference to FIGS.

  The airbag device according to this embodiment includes an airbag 1 that is normally folded and inflated and deployed in an emergency, and an inflator 10 that supplies gas to the airbag 1. This airbag device is a passenger seat airbag device and is accommodated in an instrument panel 11 disposed in front of the passenger seat. The airbag 1 is inflated and deployed in a space surrounded by the occupant H, the instrument panel 11, and the windshield 12.

  The airbag 1 includes a main bag 2 and a subbag 3 connected to the left side surface portion of the main bag 2. In this embodiment, the automobile is a left-hand drive car and the passenger seat is a right seat. The left side surface of the airbag 1 is a side surface on the vehicle body center side (inner side in the vehicle width direction), and the right side surface is a side surface on the outer side in the vehicle width direction. When mounted on a right-hand drive vehicle, the airbag 1 has a bilaterally symmetric configuration as shown.

  The main bag 2 is inflated and deployed almost in front of the occupant H. The main bag 2 has a rear part 2a, an upper part 2b, a front part 2c, a lower part 2d, a left side part 2e, and a right side part 2f. The rear part 2a of the main bag 2 has a substantially square shape when viewed from the front, and faces the upper body including the head of the occupant H when the airbag 1 is inflated and deployed.

  An insertion port 23 (see FIG. 6) of the inflator 10 is provided in the front portion 2c of the main bag 2, and gas is supplied from the inflator 10 into the main bag 2.

  A communication port 5 is provided on the left side 2e. The communication port 5 has a slit shape extending along the longitudinal direction of the vehicle. More specifically, the communication port 5 extends in a substantially vertical direction with respect to the rear portion 2a in the left side view so as to be slightly higher toward the rear. The length of the communication port 5 in the longitudinal direction is about 100 to 300 mm.

  A vent hole 6 (see FIG. 4) is provided in the right side portion 2f. The vent hole 6 has a slit shape extending in parallel with the communication port 5 along the longitudinal direction of the vehicle.

  When the main bag 2 is inflated and deployed, a pressing force that presses the inner wall of the main bag 2 outward is generated by the surface pressure of the gas pressure. By this pressing force, a tensile force is applied to pull the communication ports 5 formed in a slit shape in a direction away from each other along the longitudinal direction. By this tensile force, the pair of seal surfaces 21a and 22a provided around the communication port 5 acts in the closing direction, and the contact state between the seal surfaces 21a and 22a is maintained. Thereby, the communication port 5 is obstruct | occluded and discharge | emission of the gas from the communication port 5 is suppressed.

  When the occupant H comes into contact with the main bag 2, the main bag 2 is deformed, and the tensile force acting on the communication port 5 is reduced. Thereby, a pair of sealing surfaces 21a and 22a are separated, and the communication port 5 becomes a relatively large opening. Gas is discharged from the open communication port 5.

  The vent hole 6 has the same structure as the communication port 5, and when the main bag 2 is inflated and deployed, the pair of sealing surfaces 21 b and 22 b (see FIG. 4) are closed, the vent hole 6 is closed, and the vent hole 6 Gas emission is suppressed. When the occupant H comes into contact with the main bag 2, the pair of sealing surfaces 21b and 22b are separated from each other, the vent hole 6 becomes a relatively large opening, and the gas is discharged to the outside.

  The subbag 3 has a rear part 3a, an upper part 3b, a front part 3c, a lower part 3d, a left side part 3e, and a right side part 3f. The sub-bag 3 has a substantially cylindrical shape in which the width in the front-rear direction is larger than the width in the up-down direction and the left-right direction and the front-rear direction is the cylinder axis.

  A slit-like communication port 4 is provided in the right side portion 3 f of the subbag 3. In a state where the communication port 4 of the sub bag 3 is aligned with the communication port 5 of the main bag 2, the peripheral edges of these communication ports 4 and 5 are joined together by the suture thread 15. Thereby, the sub bag 3 is connected to the main bag 2. The gas discharged from the main bag 2 flows into the sub bag 3 through the open communication port 5 and the communication port 4 and is inflated and deployed.

  The subbag 3 extends along the longitudinal direction of the communication ports 4 and 5. In other words, the longitudinal direction of the subbag 3 is parallel to the extending direction of the communication ports 4 and 5.

  In this embodiment, the rear portion 3a of the subbag 3 is positioned about 10 to 30 cm behind the rear portion 2a of the main bag 2 when the subbag 3 is in an inflated state.

  The rear portion of the upper portion 3b of the sub bag 3 in the inflated state is located slightly below the rear portion of the upper surface 2b of the main bag 2. Further, the rear part of the lower part 3 d of the subbag 3 is located above the rear part of the lower part 2 d of the main bag 2.

  The main bag 2 is produced by sewing the peripheral edges of the first panel 21 shown in FIG. 5 and the second panel 22 shown in FIG. The first panel 21 constitutes a rear portion 2a, an upper portion 2b, an upper side 2eu on the left side, and an upper side 2fu on the right side. The second panel 22 constitutes a front part 2c, a lower part 2d, a lower side 2ed of the left side part, and a lower side 2fd of the right side part of the main bag 2.

  The left end portion of the first panel 21 and the left end portion of the second panel 22 form a pair of seal surfaces 21 a and 22 a provided around the communication port 5. The right end portion of the first panel 21 and the right end portion of the second panel 22 form a pair of seal surfaces 21 b and 22 b provided around the vent hole 6.

  When the main bag 2 is manufactured, the side 21A of the first panel 21 and the side 22A of the second panel 22 are stitched together. Similarly, the sides 21B and 22B, the sides 21C and 22C, the sides 21H and 22H, the sides 21K and 22K, and the sides 21L and 22L are stitched together. Further, the side 21D and the side 21E, and the side 21F and the side 21G of the first panel 21 are stitched together.

  The side 21J of the first panel 21 and the side 22J of the second panel 22 are sewn with sutures except for the sealing surfaces 21a and 22a. Further, the end portions in the longitudinal direction of the sealing surfaces 21a and 22a are also sutured with a suture thread. Of the sides 21 </ b> J and 22 </ b> J, a portion that is not stitched becomes the slit-shaped communication port 5.

  The side 21I of the first panel 21 and the side 22I of the second panel 22 are sewn at portions other than the sealing surfaces 21b and 22b. Further, the longitudinal ends of the sealing surfaces 21b and 22b are also stitched together. Of the sides 21I and 22I, a portion that is not sewn is a slit-shaped vent hole 6.

  The subbag 3 is produced by folding back the panel 30 shown in FIG. 7, overlapping one half side 31 and the other half side 32, and stitching the periphery. A slit 30 a is formed on the half side 31, and this slit 30 a becomes the communication port 4. The air bag 1 is manufactured by aligning the slit 30a and the slit-shaped communication port 5 of the main bag 2 so as to overlap each other, and connecting the peripheral edges of the slit 30a and the communication port 5 with the suture thread 15.

  When the inflator 10 is activated, gas is supplied from the inflator 10 into the main bag 2, and the main bag 2 is inflated and deployed. Until the occupant H comes into contact with the main bag 2, the sub bag 3 is not inflated and deployed as shown in FIG. When the occupant H comes into contact with the main bag 2, the communication port 5 and the vent hole 6 are opened, and the gas supplied into the main bag 2 is supplied into the sub bag 3 through the communication port 5 and the communication port 4. . Thereby, as shown in FIG.1 (b), the subbag 3 expand | swells and expands.

  In this embodiment, the communication port 5 is closed until the occupant H comes into contact with the main bag 2, and the discharge of gas from the communication port 5 is suppressed, so that the main bag 2 is rapidly inflated and deployed.

  In the case of a diagonal collision to the left of the vehicle or a micro lap collision, the occupant H moves diagonally to the left and is restrained by the sub bag 3 and the main bag 2.

  In the above-described embodiment, an example in which the slit-shaped vent hole 6 is provided in the right side portion 2f that is the outer side in the vehicle width direction of the main bag 2 has been described, but the vent hole 6 may not be slit-shaped, It may be. Further, the vent hole 6 may be omitted.

  In the above embodiment, the example in which the rear portion 3a of the subbag 3 is located behind the rear portion 2a of the main bag 2 in the expansion completion state of the subbag 3 has been described, but the position of the rear portion 3a is not limited thereto, For example, the rear portion 3a of the sub bag 3 and the rear portion 2a of the main bag 2 may be flush with each other.

  In the above embodiment, the example in which the sub bag 3 is provided on the left side 2e that is the vehicle width direction inner side of the main bag 2 has been described, but the sub bag 3 may be provided on the right side 2f that is the vehicle width direction outer side, You may provide in both the left side part 2e and the right side part 2f.

  In the said embodiment, about the slit-shaped communication port 5, although the sealing surfaces 21a and 22a demonstrated the structure which suppresses discharge | emission of gas by contacting each other, the structure of the communication port 5 is not limited to this, The configuration may be such that gas is suppressed from being discharged until the occupant H comes into contact with the main bag 2 and gas is discharged when the occupant H comes into contact with the main bag 2. For example, a cut may be made in the panel (base fabric), and this may be used as the slit-shaped communication port 5.

  In the above-described embodiment, the example in which the sub bag 3 is manufactured by folding one panel 30 and sewing the peripheral edge has been described, but the peripheral edge of the two panels may be manufactured by sewing. For example, the subbag 3 can be manufactured with the two panels 33 and 34 shown in FIGS.

  In this case, first, as shown in FIG. 8, the center projecting portion of the side 33 </ b> A of the panel 33 is stitched to the side 21 </ b> J of the first panel 21. Further, as shown in FIG. 9, the center overhanging portion of the side 34 </ b> A of the panel 34 is stitched to the side 22 </ b> J of the second panel 22.

  Then, the main bag 2 is produced by stitching the peripheral portions of the first panel 21 and the second panel 22 (excluding the portion that becomes the communication port 5). In addition, the peripheral portion of the panel 33 and the panel 34 (excluding the portion that becomes the communication port 4) is stitched to produce the subbag 3. Thereby, the airbag 1 provided with the main bag 2 and the subbag 3 connected with the side part of the main bag 2 is producible.

  As shown in FIG. 10A, a sub-bag 3A having a trapezoidal shape in a side view may be used, and as shown in FIG. 10B, a sub-bag 3B having a rectangular shape in a side view may be used. It may be used. The sub bags 3A and 3B have a reduced bag capacity. The width of the sub bag 3A in the vertical direction is smaller toward the rear of the vehicle.

  As shown in FIG. 11A, a sub bag 3 </ b> C provided with a projecting portion 35 that projects to the front side may be used. The overhanging portion 35 expands along the instrument panel 11. The sub-bag 3C has a large contact area with the instrument panel 11, and can be inflated and deployed stably. As shown in FIG. 11B, a sub bag 3D provided with an overhanging portion 36 projecting downward may be used. The overhanging portion 36 develops along the instrument panel 11. Moreover, as shown in FIG.11 (c), you may use the subbag 3E which provided the overhang | projection part 35 and the overhang | projection part 36. FIG.

  The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

DESCRIPTION OF SYMBOLS 1 Air bag 2 Main bag 3 Sub bag 4, 5 Communication port 6 Vent hole 10 Inflator 11 Instrument panel 12 Windshield

Claims (6)

An airbag for a passenger seat that inflates and deploys between a passenger seat and an instrument panel,
A main bag and a sub bag connected to the side of the main bag in the vehicle width direction;
A slit-shaped communication port is provided on the side portion of the main bag,
As the occupant contacts the main bag, the closed communication port opens, and gas flows from the main bag to the sub bag through the open communication port so that the sub bag expands. An airbag characterized by being configured. The communication port according to claim 1, wherein the communication port extends in the vehicle front-rear direction when the main bag is inflated.
The sub bag extends in a longitudinal direction of the communication port in a state where the sub bag is completely inflated.   3. The airbag according to claim 2, wherein the sub-bag has a projecting portion that projects to the front side and / or the lower side when the sub-bag is in an inflated state. In any one of Claim 1 to 3, the side part of the vehicle width direction outer side of the said main bag is provided with the slit-shaped vent hole,
The air vent is configured so that the vent hole in the closed state is opened in accordance with a passenger contact with the main bag, and gas is discharged from the main bag through the vent hole opened. bag.   The airbag according to any one of claims 1 to 4, wherein the rear portion of the subbag is positioned rearward of the main bag in the inflated state. An airbag according to any one of claims 1 to 5;
An inflator for supplying gas to the main bag;
An air bag device comprising:

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